Solipsis
is a pure peer-to-peer system for a massively shared virtual world.
There are no central servers at all: it only relies on end-users'
machines.

Solipsis is a public virtual territory. The world is initially
empty and only users will fill it by creating and running entities. No
pre-existing cities, inhabitants nor scenario to respect...

Solipsis is open-source, so everybody can enhance the protocols
and the algorithms. Moreover, the system architecture clearly separates
the different tasks, so that peer-to-peer hackers as well as multimedia
geeks can find a good place to have fun here!

Current versions of Solipsis give the opportunity to act as
pionneers in a pre-cambrian world. You only have a 2D representation of
the virtual world and some basic tools devoted to communications and
interactions. But it just works, so, come on and enjoy !